Rivers — International rivers — Freedom of navigation — Definition — Safety regulations — Whether constituting impediment to freedom of navigation — Revised Act Concerning Navigation of the Rhine (Act of Mannheim), 1868–1922, Article 1

Treaties — Effect in municipal law — Priority of treaty provisions over conflicting provisions of municipal law — Revised Act concerning Navigation of the Rhine (Act of Mannheim), 1868–1922, Article 1 — Whether municipal legislation in conflict with Revised Act — Primacy of Revised Act over municipal legislation — The law of the Netherlands